RT-AX86U Pro PPPoE Limitations

[geralds34]

I have Bell Fiber to the house, on a symmetric 3G plan. Testing speeds on the HH4000, its reports speeds of 3.2 down and up

If I connect the AX86U Pro to the 10G port of the HH4000 and it is configured as a router, speeds test from the Asus report 2336.92 down and 2352.84 up , but this config is then double NAT .

Reconfig the AX86U Pro to use PPPoE as the WAN connection type, bypassing the HH4000 to the extent possible and eliminate double NAT, I see speeds of 2338.18 down and 1537.76 up.


Is the lower upload speed when configure to use PPPoE a limitation of the AX86U Pro?


Do I think the lower upload speed has any effect on the family, no, but curious what the bottleneck is, or if I have missed something in my setup.
Using Asus Firmware Version: 3.0.0.6.102_34349

 

[degrub]

Running the router based speed test may be consuming CPU that affects the result. Try with a 2,5G client into a 2,5G port on the router. Also, 2.3 Gb/s would be about the max possible for a 2.5 Gb/s port given packet overheads. Other threads have reported issues with PPPoe upload rates. search the threads for PPPoe

 

[bbunge]

What do you have the MTU set for? 1492 is the default for PPPoE. If you have it set to 1500, which is the default for Ethernet, the upload may be slow due to upstream fragmentation. Set the MTU for 1492 or lower.

 

[geralds34]

What do you have the MTU set for? 1492 is the default for PPPoE. If you have it set to 1500, which is the default for Ethernet, the upload may be slow due to upstream fragmentation. Set the MTU for 1492 or lower.

1492 seems to be default when using PPPoE. From the WAN Tab: